My 8 yr old female `had episode `head way back-then moving from side to side -jerky movement- dewlap extended-body ridged,eyes jerking `then she took of running -as if scared.She had a spell? again in middle of night.She is not in heat.I van pet her when this is going on-no change.she had one during her bath-old age? worm in brain-idk-The woman above didn't say anything about the dewlap? she never head pops me - only my male friend.She met a male here in our hm`she went nuts! though she should meet a member of her clan- bad move.He had no response to the crazy female.